Improvement in metallurgic furnaces



a. WILLIAMS.

'METALLURGIC FURNACE.

Pat ented Feb. 29, 11876.

N PETERS, FHOTO-LI'KMOGRAPHER, WASHINGTON D C veying the heated gasesJOSEPH WILLIAMS, OF SHARPSBURG, PENNSYLVANIA.

IMPROVEMENT IN METALLU RGIC FURNACES.

Specification forming part of Letters Patent N 174, 100,

dated February '29, 1876 application. filed January 24, 1876.

To all whom it may concern:

Be it known that I, JosEPH WILLIAMS, of Sharpsburg, State of Pen in thecounty of Allegheny and nsylvania, have invented a new and usefulImprovement in Metallurgic Furnaces and I do hereby declare that thefollowing is a fulL and exact description thereof, reference being badto the accompanying drawings and to the letters of reference markedthereon.

In metallurgic furnaces the gases, after performing their office in theworkingchamber, are usually carried off through the stack.

Now, the object of my invention is to utilize the heat which is usuallycarried off by condium of a line, to a stack, which is placed at the endof the furnace having the fire-chamber, and connecting the working-chamber with the stack through the medium of a flue, in which isplaced an injecting device, which serves the double purpose oftransmitting the gases from the stack over the fire-place to theworkingchamber, commingling said gases with air, steam, or gas, anddischarging them directly upon the working-bed.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the accompanying-drawin gs, which form part. of my specification,Figurel is a side elevation of my improvement in metallurgic furnaces.Fig. 2 is a vertical longitudinal section of the same.

In the drawings, A. represents the fire-chamber of the furnace; B, theworking-chamber; O, the flue leading to the stack D, which communicateswith a line, 6, passing over the firechamber to the working-chambeh:Within the stack and flue e is an ejectingpipe, f, for directing theascending gases in the stack back through the flue 0 into theworkingcham ber B, by forcing, through the medium of a fan or othersuitable device, a current of air,

back, through the mesteam, or gas through the pipe j, which currents ofair, steam, or gas will draw the gases from the stack D, which,commingling with the currents of steam, charged directly upon the bed inthe workingchamber, thereby greatly adding to the heat within thefurnace, and thus utilizing the heat of the gases usually carried offthrough the stack. The stack is furnished with a damper, s, which may beutilized in controlling the volume of gas passing from the stackthat isto say, when the-damper is closed a greater volume of gas from the stackwill pass through the flue 6 into the working-chamber, and when thedamper is opened a less volume will pass through the flue einto theworking-chamber.

It will be seen that as the flue e is placed directly over the fireplaceit will be highly heated, restoring to the gases the heat lost duringtheir passage through the flue 0. It will also be seenthat the mixedgases are discharged directly upon the working-bed B before having anyopportunity to combine with the gases rising from the fire-place.

I do not claim the combination of a furnace and pipes or-flues arrangedto combine other gases with those'from the furnace and return the mixedgases to the furnace; but

I claim- 1 The combination, in a furnace, of the fireplace A,working-bed B, stack D, injectingpipe f, and flue e, gases above thefire-place from the stack to a point above the working-bed, as setforth.

2. The combination working-bed, and stack, of the injectingpipe f andflue 0, whereby the gases passing from the stack to the workingbed arereheated without being mingled with the gases rising from the furnace,as described.

JOSEPH WILLIAMS. Witnesses:

A. O. JoHNs'roN, D. I. K. RINE.

air, or gas, will be dis-- arranged to convey the with the fire-place,

